It wasnarrated that 'Aishah said:
"The Messenger of Allah (ﷺ) usedtosleep during the first part of the night and stay awake during thelatter part." (JA)
English reference (JA): Vol. 1, Book 5, Hadith 1365 (JA)
Arabic reference (JA): Book 5, Hadith 1427 (JA)